Broaching apparatus



Aug. 14, 1923.

C. S. AMADON BROACHING APPARATUS Original Filed Jan. 23 1920 Y v \Y\\a @www cfm@ @my @macht mmlmamqmf Patented Aug, 14,` 1923..

lAtteZtiE rieure 'tres freier erre.

CHARLES SIDNEY AMADDN, OFVNEW L ONDGN, CGNNECTICUT, ASSIGNOR TO THE LT. N. LPOINTE COMPANY, OF NEXV'LONDON, CONNECTICUT, A CORPORATEON OF IVIAIINE.V

nnofnorrrrve APPARATUS.

Application led January 23, 1820, Serial No. 353,538.

T0 all w/iom t mag/,concern Be it known that l, CHARLES SIDNEY Antenore, a Citizen or" ythe United States, residing at 52 Gorton Street, New London, in the county of VNew London and State Vof Connecticut, have invented certain new and useful improvements in Broaching Apparatus, of which the o'llowing'is a specifi-` ing stroke to multiply the. capacity ofthe machine, so thatone machine does the work of a plurality ot machines, with corresponding decrease in Acost of the work per junit and increase infspeed of production. The objects or the invention are accomplished by proridingrin place of. the customary work holder, a iixture having arrangements tor holding` a multiplicity of pieces of work, each independent ot the others, and proT viding in the tool holding head a fixture for holding a multiplicity' of tools, one cor# responding to each holder .on the work holding fixture. The/'corresponding tools and work holders may each be rotatable" about their common axis, or one of them may be so rotatable so .that a proper alignment of every Cutting edge is obtainable with respect to its'work, and then the single draw head'ofA the breaching machineA on the slow stroke does the work of a number of maohines VVwhile occupying only the floor spaceV and the working time hitherto requisite for a single piece Y 'An embodiment of the invention is illustrated in the accompanying drawing but it will be understood that this is only illus-1 trative, and that variations may be made. It -is intended that the patent shall cover,

by suitable expression in the appended claims,"`whate`ver features of patentable novelty exist in the invention disclosed.

Renewed June 8, 1923,

In the accompanying` drawing: l

Figure l is a side elevation in medial section through a part of a breaching machine; and

Figure 2 is an end elevation of the same.

Referring to the drawings, l0 indicates the frame of a broaehing machine having anjend plate 11 inward from which a head 12 is drawn by any suitable means, not illustrated, suchV as the customary screw drawn by a nut which is rotated by mechanism at the other end of the machine. The part of frame 10 which is illustrated is a hollow horizontal strut which is strongly in compression during` the operation of the machine, while the head 12 within it is being pulled in the direction of the arrow, at which time the teeth of the tools 2O engaged in cutting the work are resisted by the end plate 11. The latter has a large circular opening 13 in which fits a fixture 14 having a multiplicity of smaller circular openings 15, suitably spaced and each containing a work holder 16 whichmay be of any ordinary or suitable type. As illus` trated,rthe fixture has a simple cylindrical `body which fits within the end plate. It

may be rotatable therein for adjustment, or it may as indicated at 17 in `Figure 2 be arranged with means such as a spline or key which permits of the setting of the fixture always in a certain precisely defined position, in which the openings l5 which .holder in turn, if of ordinary design, has a iange which engages the outer plane face 0f the fixture 11i and transmits the thrust from the work to the fixture. The head 12 has a' stout flange corresponding in diameter tothe diameter of the fixture 14, in which .are a series of holes 21 on the same axesVv as those of the work holders 16, into which holes are screwed studs 18 constituting sub-heads, each of which is adapted, as by a screw hole 19, to receive the end orp and to pull one of the breaching tools 20. The Sub-head5 18 are removable so that di'erent ones can be substituted, and the CII to Work holders as regards their angular position each to cach around the exis ot the niain head f., and fixture lil. lit, as

illustrated,pthe hack side et the breaching: tool is on the axis or its sub-head and Work holder, the said snohead and "work holder may be 'relativel-i7 rotatable, eitl er one with respect to the other r'or adjustinentg er thejT may it desired, be ixed in their angular relations about their own exis by methods Well known. ln any event it is desirableV that the suh-heads be arranged synunetrically with respect to the r. xiis et heil l2 and finiture ll in u'nif j case the resultant stress will be cared 'for by the reach t.. L l.

ine with. af; little distortion as it the machine were, as heretofore customary, palline; but a single breach.

In operation, the tools and Worlr hei' L set up indicated, a movement oi". the single head l2 in the ordinary,v Working; oit the machine carries out its op i allel on W :tener nuniher oit L are held by the fixtureg and loes this in the saine tiine that would he requinr for doing it'on one only. rlhe opera ion. o; the machine, therefore.j `produces the output oit a multiplicity7 oi machines with pineticalli'Y no increase oit coet tor tlooi. space, or inachinerjy, lahor or time` except that i.'; quired ytor clianoiiigV the e'refter number ol pieces el? Werl; t

i end ci stroke; and in any case where that chang'ing` can he doneduringthe returnstrolie therel is not eren increase ol cost due to this cause.

Although tour such sub-hezuls and worlr holders are chosen 'for illustration7 it is obio-ug that the .invention has utility with any plural number. rlhere may be inten changeable xtures lll diIlerentlg equipped as to -si/ie, number, rindand location oil? Work holders, suitable provisionbeing` inadeV iinpelled head combined Vwith. a plura..

on the head 12 by eXtra holes or interchange'- able parts to hold sub-heads eo-operating therewith. Y

l claim as my invent-ion 1*- l. Broaehingapparatus having a powerirnpelled 4head adapted for holding a plurality ofV breaches,"combined with an end plate'adapted for holdinga plurality of independent pieces of work with each piece in operative relation Vwith Va breach, and means permitting angular.adjustment ot each piece of work with respect to the direction ot travel ofV the breach operating upon it.

2. Bleaching apparatus haring; a iinpelled head adapted for holding ralitj; ot breaches, combined with an end power Yplate having' a fixture removable therefrom adapted tor holding' oluralitgv et `independent pieces ot Work 1with each pieee operative relation with a breach, and harineg means permitting angular adjustment of ez'V piece oi. Work with respect to the eirec'ion of travel ot the breach operat ifi' upon it.

lrouching apparatus having' a pouverw impe-lied head adapted for holding,` a plu rality ot broa -i combined with an end plate co .prisingj a fixture removable there-- from, verl?. holders mountd on the ,fixture adapte 'to hold a plura ,'.ty of independent pie Work with each piece inoperative reln on to a breachl1 and ineens peru ang r adiustrnentv oit Veach Work with respect to the directionot travel et the breach operating' upon the rrerlr. held hy each Work holder.

l'roachingv apparatus haring'a poirieret subfheade sei/eralliY adapted tor-*holding .bri ielles; ari-end plate; lixture reniorable therefrom and uff-u s holders vor the Vl'rture the'whole adapted vfor theworlf holders nd the sub-heads to in alignment7 and the sub-heads `and 'Work holders which Iare in line being; adjustable angulz-,rljv one with respect to the other. Y 7

Signed at New London,` Connecticut, this 29th day of January', 1920.

.errantes sinner airliner. 

